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Diversity and Biogeography of Ants in Mongolia (Hymenoptera: Formicidae)

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ASIAN MYRMECOLOGY Volume 6, 63–82, 2014 ISSN 1985-1944 © BADAMDORJ BAYARTOGTOKH , ULYKPAN AI B EK , SEIKI YAMANE AND MARTIN PFEIFFER Diversity and biogeography of ants in Mongolia (Hymenoptera: Formicidae) BADAMDORJ BAYARTOGTOKH 1, ULYKPAN AI B EK 2, SEIKI YAMANE 3 AND MARTIN PFEIFFER 2 1Department of Zoology, School of Biology and Biotechnology, National University of Mongolia, Ulaanbaatar 210646, Mongolia 2Department of Ecology, School of Biology and Biotechnology, National University of Mongolia, Ulaanbaatar 210646, Mongolia 3Graduate School of Science and Engineering, Kagoshima University, Kagoshima, 890-0065 Japan Corresponding author’s e-mail: [email protected] ABSTRACT. Information on the biogeographical composition and spatial distribution patterns of ant assemblages in Mongolia is relatively scarce. In this study we investigated species richness, spatial distribution and biogeographical composition of the Mongolian ant fauna and recorded a total of 71 species belonging to 17 genera and three subfamilies. Genus and species richness of ants is lower in Mongolia than in most surrounding geopolitical regions. Using published literature as well as our own data we examined how ant species richness was related to phytogeographical elements. The major part of the Mongolian ant fauna is associated with the mountain taiga and forest-steppe ecosystems. A few ant species belong to the arid steppe, semi-desert and desert ecosystems. We observed no significant correlation between species richness of ants and land area size of phytogeographical regions; however, species richness of ants and plants in various phytogeographical regions showed a significant positive correlation. We did not detect strong differentiation of ant species along the elevational gradients of the country as most of the species were recorded in a wide range of elevations, but mid-elevational altitudes (1000 – 2000 m a.s.l.) showed the greatest diversity of ants. Regarding the biogeographical composition, species with wide geographical distributions, i.e. Transpalaearctic species together with Eastern Palaearctic, Central and East Asian elements, comprise a large proportion of the ant fauna in Mongolia. The ant fauna of Mongolia does not differ significantly from that of neighbouring regions, and the majority of species occurring in this country probably originated in neighbouring areas to the west, north and east. Keywords: Formicidae, area size, biogeography, distribution, diversity, elevation, Mongolia INTRODUCTION Mocsáry & Szépligeti (1901) and Ruzsky (1903, 1915) published the pioneer works on Ants are common, almost ubiquitous insects in the Mongolian ants, based on material from Mongolia, and they can be found in all ecosystems the southern Gobi and northern forested areas. and main terrestrial habitats. However, the ant However, the exact locality of some historical fauna of Mongolia is still incompletely known. records from southern and northern Mongolia is 5 - AM 6 - Diversity and biogeography of ants in Mongolia.indd 63 22-May-14 11:27:20 AM 64 Badamdorj Bayartogtokh, Ulykpan Aibek, Seiki Yamane and Martin Pfeiffer unclear, because these places are now in China genera, with new records of six species. They or Russia, and difficult to access. For instance, excluded several species from the checklist due to Holgersen (1943) recorded Myrmica rubra improbable occurrence or incorrect identification. (Linnaeus, 1758) from the place named as Sajan, Subsequently, Yamane & Aibek (2007) published Sistikem, but Wetterer & Radchenko (2011) a short note on ants of Mongolia that included all revealed that the actual name of this place is species also included in Pfeiffer et al. (2007). Systyg Khem of the Sayan Mountains (in Siberia), Later studies focused on certain which is located in the Russian Republic of Tuva. systematic groups, rather than on documentation Another example is Stitz (1934), who reported of overall faunal diversity. Thus, Aibek & five species, namely Formica clara Forel, Yamane (2009) reviewed the genus Camponotus 1886, F. picea Nylander, 1846, Lasius alienus in Mongolia, and recorded five species along with (Foerster 1850), Tapinoma geei Wheeler, 1927 a new finding of two species,C. aterrimus Emery, and T. orthocephalum Stitz, 1934 from south and 1895 and C. (Tanaemyrmex) tashcumiri Tarbinsky, southwestern Mongolia, without giving exact 1976. Subsequently, these authors studied the names of the collection localities. Two of the subgenera Austrolasius and Dendrolasius of the above-mentioned species, T. geei and L. alienus, genus Lasius in Mongolia (Aibek & Yamane have not yet been confirmed in Mongolia. It is 2010), and reported nine species of Lasius, two possible that the collection sites are located in of which, namely L. (Austrolasius) reginae Faber, Inner Mongolia, China. 1967 and L. (Dendrolasius) fuji Radchenko, Actual research on ants in Mongolia is 2005, were new records for the Mongolian fauna. considered to have commenced in the mid 1960s Lasius obscuratus Stitz, 1930, which had been with Dlussky (Dlussky 1965). Later, Pisarski excluded from the Mongolian fauna by Pfeiffer (1969a, b), Dlussky & Pisarski (1970), Pisarski et al. (2007), who doubted the occurrence of this & Krzysztofiak (1981) and Radchenko (1994a) species in Mongolia, was again listed by Aibek & published extensive works and recorded more Yamane (2010). However, the nominal subgenus than 50 species for the country. However, this Lasius has not been seriously revised, leaving number required some amending to reflect the many problems. taxonomic status and actual occurrence of some More recently, Yamane & Aibek (2012) species in Mongolia. Therefore, Radchenko studied the distributional patterns of 14 species (1994a, b, 1995, 1997, 2005) and Seifert (2000, of the genus Myrmica in Mongolia, and provided 2002, 2004) provided additional information on an identification key for all those species. the ants of Mongolia, and were concerned with the They omitted Myrmica commarginata Ruzsky, taxonomic resolution of the species. Pfeiffer et al. 1905 from the species list, but newly added M. (2003) completed the first comprehensive study lobicornis Nylander, 1846. on ant communities in Mongolia examining the A significant focus for present-day distribution patterns of ants along an ecological myrmecologists is the assessment of biodiversity, gradient from steppe to desert, assessing the community composition, biogeography, and other impact of climatic parameters and the influence basic investigations of the ecology of a regional of vegetation on community structure and species ant biota. Such a study would grant researchers diversity of ants. Later, Aibek et al. (2006) a background from which to begin further reported 17 species from Mt Bogdkhan in north- more detailed studies. The research presented central Mongolia along with information on here examines the ant fauna of Mongolia in a nesting habits of each species. They reviewed the biogeographical and ecological context. For the ant species list recorded in this mountain area, moment we simply attempt to combine what is and made comments on status and earlier records already known with our unpublished data in order of some of those species. to contribute to a better understanding of the Summarising the literature sources as diversity and biogeography of ants in Mongolia. well as their unpublished records, a checklist of Hopefully, this work will also help to conserve ants in Mongolia was published by Pfeiffer et the interesting ant fauna of Mongolia. al. (2007), which reported 68 species from 17 5 - AM 6 - Diversity and biogeography of ants in Mongolia.indd 64 22-May-14 11:27:20 AM Diversity and biogeography of ants in Mongolia (Hymenoptera: Formicidae) 65 Fig. 1. Phytogeographical regions of Mongolia (modified after Yunatov 1950). Refer to “Study area” subsection for numbering of these regions. White dots represent major cities, black dots the sampling points of our study. Dark green represents mountain taiga forest, light green – forest steppe, yellowish green – steppe, yellow – semi- desert, tawny – desert ecosystems. & Dagvadorj 2010). The highest precipitation MATERIALS AND METHODS values do not exceed 600 mm in the northern mountains, whereas southern desert areas receive Study area roughly 50 mm of precipitation. From the north to the south of the country, mean annual precipitation Mongolia stretches across central and north- decreases steadily, which is a decisive factor for east Asia, and occupies several vegetation zones the distribution of vegetation formations. From where the Siberian taiga forest meets the Central north to south it not only gets drier, but warmer Asian steppe and desert. The north-south axis as well. From the west to the east some areas measures more than 1,200 km at its maximum, show comparatively low precipitation because and the widest east-west distance reaches about they are on the lee side of mountain chains. Such 2,370 km. Mongolia is an upland country, with an a rain shadow effect is most pronounced in the average elevation of 1,580 m (range of elevation: depressions of larger lakes in western Mongolia, 560 – 4374 m), and about 85% of its area elevated but it is recognisable in central and eastern over 1,000 m a.s.l. (Murzaev 1952). Mongolia (Hilbig 1995). This complex set of Mongolia has an extreme continental parameters, together with the large area of the climate, and temperature fluctuates greatly, both country, creates a large variety of habitats and daily and annually.
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  • First Record of the Permanent Social Parasitic, Slavemaking Ant Harpagoxenus Sublaevis (NYLANDER, 1852) for Belgium (Hymenoptera, Formicidae)

    First Record of the Permanent Social Parasitic, Slavemaking Ant Harpagoxenus Sublaevis (NYLANDER, 1852) for Belgium (Hymenoptera, Formicidae)

    ~ Bulletin S.R.B.E.IK.B.V.E., 142 (2006): 21-24 First record of the permanent social parasitic, slavemaking ant Harpagoxenus sublaevis (NYLANDER, 1852) for Belgium (Hymenoptera, Formicidae) Peter BOER 1 & Wouter DEKONINC~ 1 Gemene Bos 12, 1861 HG Bergen, The Netherlands (e-mail: [email protected]). 2 Royal Belgian Institute of Natural Sciences, Department Entomology, Vautierstraat 29, B-1000 Brussels, Belgium. Abstract We report the first record of the permanent parasitic ant Harpagoxenus sublaevis (NYLANDER, 1852) in Belgium. A nest of the species was discovered on 3.V.2006 in Nahtsief in the Hautes Fagnes. In the nest workers of its frequently used host Leptothorax acervorum (F ABRICJUS, 1793) were found. This paper presents the locality, coexisting ant fauna and possibilities where to rediscover this species. Keywords: first record, Belgium, Harpagoxenus sublaevis, faunistic. Resume Nous signalons la premiere capture d 'Harpagoxenus sublaevis (NYLANDER, 1852) une fo urmi esclavagisteobligatoire en Belgique. Un nid de cette espece a ete trouve le 3.V.2006 a Nahtsiefdans les Hautes Fagnes, dans lequel se trouvaient egalement des ouvrieres de Leptothorax acervorum (FABRICIUS, 1793), une des especes cibles d'Harpagoxenus sublaevis. Ici on commente la localite, les differentes fourmis avoisinantes et les possibilites de retrouver 1'es pece en Belgique. Samenvatting We melden hier de eerste waam eming van de permanent, parasitaire slavenjaagster Ha1pagoxenus sublaevis (NYLANDER, 1852), de nijptangmier in Belgie. Een nest van deze soort werd ontdekt op 3.V.2006 in Nahtsief in de Hoge Venen. In het nest werden ook werksters van de vaak door deze soort gebruikte gastheer Leptothorax acervorum (FABRJCJUS, 1793) gevonden.